// Used in SFileGetFileInfo
bool QueryMpqSignatureInfo(
TMPQArchive * ha,
PMPQ_SIGNATURE_INFO pSI)
{
TFileEntry * pFileEntry;
ULONGLONG ExtraBytes;
DWORD dwFileSize;
// Make sure it's all zeroed
memset(pSI, 0, sizeof(MPQ_SIGNATURE_INFO));
// Calculate the range of the MPQ
CalculateArchiveRange(ha, pSI);
// If there is "(signature)" file in the MPQ, it has a weak signature
pFileEntry = GetFileEntryLocale(ha, SIGNATURE_NAME, LANG_NEUTRAL);
if(pFileEntry != NULL)
{
// Calculate the begin and end of the signature file itself
pSI->BeginExclude = ha->MpqPos + pFileEntry->ByteOffset;
pSI->EndExclude = pSI->BeginExclude + pFileEntry->dwCmpSize;
dwFileSize = (DWORD)(pSI->EndExclude - pSI->BeginExclude);
// Does the signature have proper size?
if(dwFileSize == MPQ_SIGNATURE_FILE_SIZE)
{
// Read the weak signature
if(!FileStream_Read(ha->pStream, &pSI->BeginExclude, pSI->Signature, dwFileSize))
return false;
pSI->SignatureTypes |= SIGNATURE_TYPE_WEAK;
pSI->cbSignatureSize = dwFileSize;
return true;
}
}
// If there is extra bytes beyond the end of the archive,
// it's the strong signature
ExtraBytes = pSI->EndOfFile - pSI->EndMpqData;
if(ExtraBytes >= (MPQ_STRONG_SIGNATURE_SIZE + 4))
{
// Read the strong signature
if(!FileStream_Read(ha->pStream, &pSI->EndMpqData, pSI->Signature, (MPQ_STRONG_SIGNATURE_SIZE + 4)))
return false;
// Check the signature header "NGIS"
if(pSI->Signature[0] != 'N' || pSI->Signature[1] != 'G' || pSI->Signature[2] != 'I' || pSI->Signature[3] != 'S')
return false;
pSI->SignatureTypes |= SIGNATURE_TYPE_STRONG;
return true;
}
// Succeeded, but no known signature found
return true;
}
// Used in SFileGetFileInfo
bool QueryMpqSignatureInfo(
TMPQArchive * ha,
PMPQ_SIGNATURE_INFO pSI)
{
ULONGLONG ExtraBytes;
TMPQFile * hf;
HANDLE hFile;
DWORD dwFileSize;
// Make sure it's all zeroed
memset(pSI, 0, sizeof(MPQ_SIGNATURE_INFO));
// Calculate the range of the MPQ
CalculateArchiveRange(ha, pSI);
// If there is "(signature)" file in the MPQ, it has a weak signature
if(SFileOpenFileEx((HANDLE)ha, SIGNATURE_NAME, SFILE_OPEN_BASE_FILE, &hFile))
{
// Get the content of the signature
SFileReadFile(hFile, pSI->Signature, sizeof(pSI->Signature), &pSI->cbSignatureSize, NULL);
// Verify the size of the signature
hf = (TMPQFile *)hFile;
// We have to exclude the signature file from the digest
pSI->BeginExclude = ha->MpqPos + hf->pFileEntry->ByteOffset;
pSI->EndExclude = pSI->BeginExclude + hf->pFileEntry->dwCmpSize;
dwFileSize = hf->dwDataSize;
// Close the file
SFileCloseFile(hFile);
pSI->SignatureTypes |= SIGNATURE_TYPE_WEAK;
return (dwFileSize == (MPQ_WEAK_SIGNATURE_SIZE + 8)) ? true : false;
}
// If there is extra bytes beyond the end of the archive,
// it's the strong signature
ExtraBytes = pSI->EndOfFile - pSI->EndMpqData;
if(ExtraBytes >= (MPQ_STRONG_SIGNATURE_SIZE + 4))
{
// Read the strong signature
if(!FileStream_Read(ha->pStream, &pSI->EndMpqData, pSI->Signature, (MPQ_STRONG_SIGNATURE_SIZE + 4)))
return false;
// Check the signature header "NGIS"
if(pSI->Signature[0] != 'N' || pSI->Signature[1] != 'G' || pSI->Signature[2] != 'I' || pSI->Signature[3] != 'S')
return false;
pSI->SignatureTypes |= SIGNATURE_TYPE_STRONG;
return true;
}
// Succeeded, but no known signature found
return true;
}
